import { constantRoutes, asyncRoutes } from '@/router'
import _import from '@/utils/_import'
import { getInfoRoute } from '@/api/user'

/**
 * 通过meta.role判断是否与当前用户权限匹配
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

export function setAsyncRoute(data) {
  const accessedRouters = data.filter(route => {
    if (route.component) {
      route.component = _import(route.component, route.parentId)
    }
    if (route.children && route.children.length) {
      route.children = setAsyncRoute(route.children)
    } else {
      delete route.children
    }
    return true
  })
  return accessedRouters
}
/*
  for (let j = 0; j < data.length; j++) {
    const item = data[j]

    const menu = {
      'path': item.route,
      'component': _import(item.componentName),
      'redirect': item.route,
      'name': item.code,
      'children': [],
      'meta': { title: item.code }
    }
    if (item.children) {
      setAsyncRoute(menu.children, item.children)
    }
    asyncRoutesTemp.push(menu)
  }*/

/**
 * 递归过滤异步路由表，返回符合用户角色权限的路由表
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = { ...route }
    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  generateRoutes({ commit }) {
    return new Promise((resolve, reject) => {
      getInfoRoute().then(response => {
        const { data } = response

        let accessedRoutes = []
        if (data) {
          accessedRoutes = setAsyncRoute(data)
        }
        accessedRoutes = accessedRoutes.concat(asyncRoutes)
        commit('SET_ROUTES', accessedRoutes)
        resolve(accessedRoutes)
      }).catch(error => {
        reject(error)
      })

      /*
      let accessedRoutes
      if (roles.includes('admin')) {
        accessedRoutes = asyncRoutes || []
      } else {
        accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
      }
      commit('SET_ROUTES', accessedRoutes)
      resolve(accessedRoutes)

      if (routeTree) {
        asyncRoutes.length = 0
        console.log(JSON.stringify())
        for (let i = 0; i < routeTree.length; i++) {
          asyncRoutes.push(routeTree[i])
        }
        console.log(asyncRoutes)
      }
      */
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
